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ADM8699AN Datasheet(PDF) 1 Page - Analog Devices |
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ADM8699AN Datasheet(HTML) 1 Page - Analog Devices |
1 / 4 page REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a Microprocessor Supervisory Circuits ADM8698/ADM8699 FUNCTIONAL BLOCK DIAGRAM RESET GENERATOR 4.65V V CC WATCHDOG INPUT WDI * ADM8698/ ADM8699 RESET WATCHDOG OUTPUT WDO* RESET * *WDI (ADM8699 ONLY) RESET (SOIC ONLY) WDO (ADM8699 SOIC ONLY) WATCHDOG TRANSITION DETECTOR (1 sec) TYPICAL APPLICATION CIRCUIT *ADM8699 ONLY +5V V CC WDI * GND ADM8698/ ADM8699 RESET µP POWER µP SYSTEM I/O LINE µP RESET FEATURES Superior Upgrade for ADM698/ADM699, MAX698/MAX699 Guaranteed RESET Assertion with VCC = 1 V Low 70 A Supply Current Precision 4.65 V Voltage Monitor Power OK/Reset Time Delay Watchdog Timer Minimum Component Count Performance Specified over Temperature APPLICATIONS Microprocessor Systems Computers Controllers Intelligent Instruments Automotive Systems Critical P Power Monitoring GENERAL DESCRIPTION The ADM8698/ADM8699 supervisory circuits provide power supply monitoring and watchdog timing for microprocessor systems. The ADM8698 monitors the 5 V VCC power supply and gener- ates a RESET pulse during power up, power down and during low voltage “Brown Out” conditions. The RESET output is guaranteed to be functional (logic low) with VCC as low as 1 V. The ADM8699 features an identical monitoring circuit as in the ADM8698, plus an additional watchdog timer input to monitor microprocessor activity. The RESET output is forced low if the watchdog input is not toggled within the 1 second watchdog timeout period. Both parts are available in 8-pin plastic DIP/SOIC and 16-lead SOIC packages. The 16-lead SOIC contains additional out- puts RESET (without inversion) and Watchdog Output WDO (ADM8699 only). One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 World Wide Web Site: http://www.analog.com Fax: 617/326-8703 © Analog Devices, Inc., 1997 |
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